Card clothing

ABSTRACT

Card clothing formed of alloyed steel.

United States Patent 1191 1111 3,853,494

Graf 1 Dec. 10, 1974 CARD CLOTHING 75/123 J, 123 N [75] Inventor: Werner Graf, Freinenba ch,

Switzerland [56] References Cited 73 A G t & C A G R l UNITED STATES PATENTS sslgnee' svlxtzefla a apperswl 1,643,054 9 1927 Brown 751123 J 1,707,738 9 4/1929 Mowat et a1. 19/114 22 il d; M 8, 1972 1,959,398 5/1934 Whiteley 75/123 J 2,002,079 5/1935 Dickie 19/114 [21] Appl. No.: 252,516 3,151,362 /1964 Freitag 19/114 Primary Examiner-Winston A. Douglas Fmelgn Apphiamm Pnonty Data Assistant Examiner-O. F. Crutchfie1d May 12, 1971 Switzerland 7037/71 Attorney, Agent, or Firm Edward J. Brenner [52] US. Cl 29/1935, 19/114, 75/123 .1, q

75/123 N, 75/123 J;123 N 1 1 f :2 u 2 1 51 1111. C1 B211 /10 mg a [58] 4 11 Claims, No Drawings Field of Search 19/114; 29/1935;

CARD CLOTHING BACKGROUND OF THE INVENTION The present invention relates to improvements in card clothing.

Such clothing is especially employed as sawtooth covers for card cylinders. They serve to process fiber material and thus come into engagement with counter elements.

Previously such card clothing was formed of nonalloyed steel and attempts to achieve the desired hardness were made by varying the carbon content of the steel. Yet a certain hardness could not be exceeded since otherwise the material becomes brittle.

SUMMARY OF THE INVENTION Hence it is a primary object of the present invention to provide card clothing having increased longevity of use and which can be operated at greater speeds than heretofore possible.

Now in order to implement the aforementioned object and others which will become more readily apparent as the description proceeds the card clothing of the present invention is formed of alloyed steel.

DETAILED DESCRIPTION OF THE INVENTION As explained above an essential aspect of this development resides in forming the clothing from an alloyed steel. It has been found that in contrast to prior attempts at influencing the hardness of the clothing through the carbon content, it is possible to obtain higher hardness values, up to 1,200 Vickers hardness, with alloyed steels and with increased tensile strength of the material.

Clothing formed in the manner taught by the invention possesses increased longevity and, in other words, with average good nep values can process up to 500 tons staple fiber material formed of natural fibers as well as fibers formed of natural and synthetic polymers. A further advantage which can be realized with the present invention resides in the drastic reduction in the grinding required during the life of the card clothing. It is possible to considerably increase the intervals between the grinding operations owing to the increased service life of the clothing.

In consideration of the previously discussed properties of the card clothing of this invention it ispossible to employ advantageously clothing formed completely a of alloyed steel at high output cards.

Particularly suitable as the alloys are those containing 0.3 to 2.0 by weight carbon, 0.05 to 2.25 by weight silicon, 0.05 to 2.0 by weight manganese, 0.01 to 2.0 by weight vanadium, with the remainder iron.

The vanadium can be replaced by 0.01 to 3.5 by weight tungsten.

The aforementioned alloys can also contain both vanadium and tungsten in the indicated amounts and, if desired, additionally can contain 0.001 to 3.0 by weight boron.

It is also possible that the aforementioned alloys further contain 0.05 to 4.5 by weight chromium or tita- Similarly it has been found to be advantageous if there is added to one of the previously indicated combination of components 0.05 to 3.5 by weight nickel.

A particularly advantageous alloy contains, for instance, 0.5 to 0.6 by weight carbon, 0.5 to 0.8 by weight manganese, 1.2 to 1.6 by weight silicon, and 0.5 to 0.8 by weight chromium.

On the average there can be realized with the indicated alloys hardness values, based on a Vickers diamond pyramid hardness test, of approximately 980 with increased toughness of the material, so that card clothing formed of such materials exhibit increased longevity and simultaneously increased card efficiency.

The clothing disclosed herein can be particularly advantageously employed for carding at carding machines. The clothing contains one or a number of wireshaped structures having a sawtooth profile, the wireshaped structures consisting of one of the aforementioned alloys.

Of course, the previously disclosed alloys contain the usual amounts of traces of phosphorous and sulphur.

While there is shown and described present preferred embodiments of the invention, it is to be distinctly understood that the invention is not limited thereto but may be otherwise variously embodied and practiced within the scope of the following claims.

Accordingly, what is claimed is: v c

1. A card clothing containing at least one wireshaped structure having a sawtooth profile formed of alloyed steel wherein the alloy contains 0.3 to 2.0 percent by wei ghtcarbon, 0.05 to 2.5 percent by weight silicon, 0.05 to 2.0'percent by weight manganese and 0.0l to 2.0 percent by weight vanadium, said alloyed steel having a hardness substantially higher than that of the corresponding non-alloyed steel and up to about 1,200 based on the Vickers hardness test.

2. The card clothing as defined in claim 1, wherein the alloy further contains 0.01 to 3.5 percent by weight tungsten.-

3. The card clothing as defined in claim 1, wherein the alloy further contains 0.05 to 4.5 percent by weight chromium.

4. The card clothing as defined in claim 1, wherein the alloy contains 0.001 to 3.0 percent by weight boron.

5. The card clothing as defined in claim 1, wherein the alloy contains 0.05 to 3.5 percent by weight nickel.

shaped structure having a sawtooth profile formed of alloyed steel wherein the alloy contains 0.3 to 2.0 percent by weight of carbon, 0.05 to 2.5 percent by weight silicon, 0.05 to 2.0 percent by weight manganese and 0.01 to 3.5 percent by weight tungsten, said alloyed steel having a hardness substantially higher than that of the corresponding non-alloyed steel and up to about 1200 based on the Vickers hardness test.

8. The card clothing as'defined in claim ,7, wherein the alloy contains 0.001 to 3.0 percent by weight boron.

9. The card clothing as defined in claim 7, wherein the alloy contains 0.05 to 3.5 percent by weight nickel.

10. The card clothingas defined in claim 7, wherein the alloy contains titanium.

11. The card clothing as defined in claim 7, wherein the alloy contains 0.05 to 4.5 percent by weight chromium. 

1. A CARD CLOTHING CONTAINING AT LEAST ONE WIRE-SHAPED STRUCTURE HAVING A SAWTOOTH PROFILE FORMED OF ALLOYED STEEL WHEREIN THE ALLOY CONTAINS 0.3 TO 2.0 PERCENT BY WEIGHT CARBON, 0.05 TO 2.5 PERCENT BY WEIGHT SILICON, 0.05 TO 2.0 PERCENT BY WEIGHT MANGANESE AND 0.01 TO 2.0 PERCENT BY WEIGHT VANADIUM, SAID ALLOYED STEEL HAVING A HARDNESS SUBSTANTIALLY HIGHER THAN THAT OF THE CORRESPONDING NON-ALLOYED STEEL AND UP TO ABOUT 1,200 BASED ON THE VICKERS HARDNESS TEST.
 2. The card clothing as defined in claim 1, wherein the alloy further contains 0.01 to 3.5 percent by weight tungsten.
 3. The card clothing as defined in claim 1, wherein the alloy further contains 0.05 to 4.5 percent by weight chromium.
 4. The card clothing as defined in claim 1, wherein the alloy contains 0.001 to 3.0 percent by weight boron.
 5. The card clothing as defined in claim 1, wherein the alloy contains 0.05 to 3.5 percent by weight nickel.
 6. The card clothing as defined in claim 1, wherein the alloy contains titanium.
 7. A card clothing containing at least one wire-shaped structure having a sawtooth profile formed of alloyed steel wherein the alloy contains 0.3 to 2.0 percent by weight of carbon, 0.05 to 2.5 percent by weight silicon, 0.05 to 2.0 percent by weight manganese and 0.01 to 3.5 percent by weight tungsten, said alloyed steel having a hardness substantially higher than that of the corresponding non-alloyed steel and up to about 1200 based on the Vickers hardness test.
 8. The card clothing as defined in claim 7, wherein the alloy contains 0.001 to 3.0 percent by weight boron.
 9. The card clothing as defined in claim 7, wherein the alloy contains 0.05 to 3.5 percent by weight nickel.
 10. The card clothing as defined in claim 7, wherein the alloy contains titanium.
 11. The card clothing as defined in claim 7, wherein the alloy contains 0.05 to 4.5 percent by weight chromium. 